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→Floaters
* They are held on location by anchors or [[dynamic positioning]].
* They are held on location by anchors or [[dynamic positioning]].
* The [[drill string]] and riser are isolated from wave motion by motion compensators.
* The [http://www-odp.tamu.edu/publications/tnotes/tn31/pdf/drill_s.pdf drill string] and riser are isolated from wave motion by motion compensators.
* The wellheads and [[blowout preventer|BOPs]] are on the ocean bottom and are connected to the rig by a riser to allow circulation of [[Drilling fluid|drilling mud]].
* The wellheads and [http://www.glossary.oilfield.slb.com/en/Terms/b/blowout_preventer.aspx BOPs] are on the ocean bottom and are connected to the rig by a riser to allow circulation of [[Drilling fluid|drilling mud]].
There are two categories of floaters: semisubmersibles and drill ships.
There are two categories of floaters: semisubmersibles and drill ships.